Techniques for High Sensitivity GNSS Receivers

The objective of this study will focus on techniques for code, phase and frequency tracking, compatible for very weak GNSS signals (e.g. indoor and urban canyon environments).

Studies on high-sensitivity Rx have already focussed on weak-signal (e.g. indoor and urban canyon environments) acquisition and very narrowband tracking but topics like discriminator design for optimal weak-signal tracking, characterisation of tracking in the vicinity of loops' threshold, and transition from acquisition to tracking for weak-signals have not been addressed sufficiently and in need of a specific study in view of the interest on the GNSS performance in difficult environments.Within the scope of the activity, it can be found (with emphasis on GALILEO):1- The investigation on high-sensitivity tracking techniques and characterisation of its behaviour2- The investigation on techniques to optimize the transition from acquisition to tracking in the vicinity of the tracking loop threshold3- The proof of concept in a single-channel demonstrator